Administrator of frank



QN@ Model.) s'sheets-sheet 1. F. S. COOK, Deod.

J. W. 000K, Administrator. MACHINE FOR TAPPING SCREW NUTS.

3 Sheets-Sheet 2.

(No Model.)

F. S. COOK, Deod J. W. Goox, Administrator. BMLGIEIIBTL POR TAPPING SCREW NUTS. No. 507,972. Patented Oct. 31, 1893.

(No Mod'eL) 3 Sheets-Sheet 3.

F. S. COOK, Deod. J. W. 000K, Administrator. MACHINE FOB.l TAPPING SCREW NUTS.

N0. 507,972. Patented Oct. 31, 1893.

UNrTRD STATES ATRNT Prion.

JEROME W COOK, OF SPRINGFIELD, OHIO, ADMINISTRATOR OF FRANK S. COOK, DECEASED.

MACHINE FOR TAPPING SCREW-NUTS.

SPECIFICATION forming' part of Letters Patent NO. 507,972, dated October 31, 1893.

Application iiled September l. 1892. Serial No. 444,847. (No model.)

To all whom t may con/cern.-

Be it known that FRANK S. COOK, formerly of Springfield, Clark county, Ohio, but now deceased, did invent certain new and useful Improvements in Nut-Tapping Machines, of which I, JEROME W. COOK, administrator of the estate of said FRANK S. COOK, deceased, hereby declare that the following description, in connection with the accompanying drawings, forming part thereof, is a speci- Iication. Y

This invention relates to that type of machines made the subject of Letters Patent granted Frank S..Cook on the 21st day of October, 1890, and numbered 438,605, wherein nut-blanks are fed to a vertical tap supported in a chuck which alternately releases Y the tap at one point and simultaneously grasps Ait at another point to permit the threaded nut to drop down along the shank and leave the Y shaft without stoppingthe machine.

The present improvements relate particularly to the chuck whereby the tap is simultaneously grasped and released by alternately operating jaws, and they. consist in combining with the hollow chuck-spindle, jaws moving 'at right angles to the axis thereof and embracing flattened or squared sectionsof the tap shank between rigid interlocking surfaces; in forming such spindle with radial slotted wings provided with seats or ways for sliding jaws and recessed for the play of cams and levers operating said jaws; in combining therewith the housing and closing the top and sides of the chuck'and revolving with the spindle; in combining with the tap and chuck-spindle and one. set of sliding jaws,

- shields supported by said jaws and sliding therewith to prevent the access of chips to the chuck-devices; in combining with the tap, the chuck-spindle and housing, a pair of sliding jaws moving parallel with the top of the housing and directly underneath, and shields supported from said jaws on the upper surface of the housing and sliding with the jaws; in combining with the two sets of sliding jaws, shields attached to `the individual jaws of each set, the shields carried by one pair of jaws being arranged above 5o the shields carried yby the other pair; in combining with one or both sets of sliding jaws a sliding cam-bar or locking-bar arranged to act as a spline; and in .various other combinations and details of construction hereinafter described and'explained.

In the drawingsz--Figure 1 is a sideelevation sectioned on the line 1-1, Fig. 3, o'f a chuck-head embodying said invention. Fig. 2 is a sectional elevation, taken on the correspondingly numberedvline of Fig. 3; Fig. 3, a top plan view, in section as indicated by broken lines and arrows in Fig. 1. Fig. 4 is a vertical central section, partly broken away, on the correspondingly numbered line of Fig. 7; Fig 5, a detail, in section, on the line 5-5 of Figs. 4 and 7; Fig. 6, a vertical section on the same line as Fig. 4 with the parts in a different stage of action; Figs. 7 and 8, horizontal sections on correspondingly numbered lines in Figs. l and 4; and Fig. 9, a section onV line 9-9 of Fig. 4; Figs. 10 to 13, details in perspective, of one of the upper jaws, a locking or stop-block for controlling a lower jaw, the lower jaw to operate therewith; andthe cam-bar for actuating said lower'jaw; and Fig. 14, an enlarged detail to explain the devices for removing the tap from the chuck.

A represents the tubular chuck-spindle having at its lower end a bevel gear, A', and above said gear receiving a collar, A2, which is primarilyfor the .purpose of resting upon the top of a bearing brass, such for instance as described in an`` application led concurrently herewith, but serves also to limit the movement of a sliding sleeve, below described. Above thisV collar the spindle is slightly enlarged forming a shoulder against which the collar is seated. Clamping screws, a', one or more, hold said collar in position and prevent its rotation. The upper part of the spindle has radial wings, A3, A4, arranged on diameters, so that the two wings, A3, are opposed to each other and the wings, A4, are at an angle to the line of the preceding pair, preferably at a right angle. Inclosing and covering these wings and the spindle to a point some distance below the wings, is a cylindrical housing,'B, having an opening, b, through its top equal to the internal bore of the spindle and secured thereto so as to revolve therewith. Beneath the wings the cyvlindrical extension of the chuck-spindle re- VIOO ceves a sliding sleeve, C, which is of such diameter that `it may enter within the housing and play up and down through the bottom thereof between the top of the collar on` thelspindle and the lower edge of the wings; that is, from the position shown in Fig. 2 to that shown in Fig. 6. This sleeve 1has an annular groove, c, to receive a ring or strap, C', to which are pivoted `at c', the forks c2,

of the lever, C2, controlled, as insaid former;` patent, by a suitable cam, whereby to and fro' motion is imparted to the sleeve within the limit named. The rst pair-of wings, Aare; slotted radially from the axis of the chuck spindle to afford seats, d, for theplaylofeslid` ing jaws, D, hereinafter termed the upper jaws, which clasp the tap, D', andfthertopsfof whichicomeagainstthe=undersurfaceofithe top-:plate'of thefhousing. This toplplatelhas slots, d', parallel with fthe flineiof "movement `of the jaws, and -seini-circular lshields, D2,

`placediuponthenpper surface of `saiditop` platetare-secured to =the irespective ifjaws fby` means oi" screws, d2, passin gthrouglrsaid slots, Aso that as the jaws areadvancinglto graspthe tapthe'shields arecarried forward until their `flanged opposing edges, d3, emeet 1and =coinl pletelywcoverthe chuck,l to-shut otchips'and, dbris. 'Theserjaws are'ndt'intended tto nip` ithetap betweenitheir `faces :buttare formed with flattened:projectingteeth or lingers, d4, dwith |`faces parallel `with the axisfoflthe tap, arranged 1so that those of foneljawfslip past andinterloclnwith those of the opposing jawnasinFig 3, leavingfa'central spacefbe tween fthe base and one finger ofone jaw and thebaseand'one fingeriofvthe otherijaw `in twhich thelflattened section, Clfof `the-tap is embracedfso thatithas"oneltooth` of each j awon eaclrside, thatis, the thickness of two teeth onbolhsid'esfand isrclaspedmslit were,`

inarigidunyieldingsocket.

Beneath theseatslfor the Vupper,:jaws Jij ust described, the wings, A3, of the chuck-spindle have narrower slots, FE, `extending fto their;

base, in which are pi voted levers, Egh-aving cam projection, e,e, on leach lside of-their ing` sockets in i the bottom of Athe jaws. Re-

ing-s`leeve receive the lower ends of rip-standing'cam-bars, E3, secnredn said recesses by screws, eand. provided at their upper u ends with twocam projections, e4,c5,rthe former engaging alternately the tail-cam, e, andthe body-cam, c', of the adjacent lever "and the latter engaging with the back or heel ofthe jaw `to lock it in position. `These hars fit `snugly in the slots which receive thelevers shut and its `plane surface engages with a plane surface on said body-cam, while the plane surface, 2, of the upper projection or cam, e5, passes behind the jaw, as in Fig. l, thus locking said jaw eectually closed by the action conjoint of both cams. The second pair .of wings, A4, are also slotted radially from the axis of the chuck-spindle to form seats or ways, f, for the play of sliding jaws, F, hereinafter termed the lower jaws, since they clasp the flattened or squared lower section, f', of the tap when the upper flattened sec- .tion is releasedbythe upper jaws. Like the first set of jaws these lower jaws are formed `withprojectingteeth, f2, f3, so arranged that those of one jaw slip past and interlock with those of the opposing-jaw, asinrFig. 4-7,:1eav ling a central spacerin whichvsaid'attened or squared` sectioni` of :the tapliseinbraced, iwith one :tooth of `each jaw on -each.side,eorthe `.thickness of twofteethontboth-fsides.

:BetweenithellowerAjawandthe top'of :the `housing is `"a spacinglblock, 2F', iwh ich 'will `be nsecured: toitheT housingancf held against move- 'mentl The-contiguoussurfaces tof fthe jaw and thespacinglblock, that/is, thefupper surface of the jaw and the lower surfaceff lthe .spacingsblock `rhave longitudinal 'semi-cylindrical channels, f4, of equal;length,xwhiclrreceive theheadedrbolt, `F2,.projectingfthrough theside ofthe housing, andarountlythisibolt, fbetweenlits ihead and athe iinneruwall of the housing, is arranged :a coiled fexpansionspringfFracting toanrge fther jaws into `engagement withteaclrothernand with l.the tap. Whenthefjaws are fthusprojected the head of the bolt comesagainsttheend of the semicylindrical Ichannel tin lthe i spacingtblock as in fFig. 4,fand athe wspringiistprevented@from further expansionjbutrwhen'the jaws'are retracted thefend` of mthe channel iinithefupper surface lof ithe `jaw rpushes :backrthe'bolt be- `yonds the exterior of thedhousing, asi inJFig. 6. Albracket, rl?, ,rising from the outer end 1 of `thisbolt `bends over the "top of this housing wand'upon tthis'bracketis mounted an inclined shield, Fioneforeachjaw, which, inthe advance and'recession'of :the jaws will `be carried in toward thetapatrright `angles to1 the :pathof the underlying tshields on'the upper `jaws,to meet its companion4 supported from and moving with the opposite'jaw, orrit will be thrown out asin Fig.` 6,such closing and opening movementsbeing alternate with the closingand opening) movements of the shields beneath, mounted on the upper jaws. The spacing-block is cut away on one side, and at its extrexnefend has attacheda lockingstrip,f5, of the same thickness asthe cut awayportion, ,thus forming with the f shoulder, f6, of the cut away part achannehf?, for the reception of the locking end of thecamsplate or bar presently described. The lower end of this strip depends beneathlthe blockrto'such a `point that,when the lower jaw` isprojected, it will come above and form an extension of `a lug,f8, projecting from a cut away, part of IOO Vthe lever Which actuates said jaw,

said lower j aw, and at sucha distance fromashoulder, flo; thereof, leaving a-channehf",l of the width of that in the spacing-block, so that when the strip or lug or off-set register with each other, an extended channel will be formed 'ona single line with the same width throughout, and any plate filling said channel wiilflock the jaw to -the unyieldi'ng spacing-blockand prevent it from either advancing orretreating. i

Beneath theseats for the lower jaws the wings, A4, of the chuck-spindle are slotted down to theirbase, but these-slots,G, are narrower than vthe seats for the jaws and of such width only that they will receive'the pivoted levers, G', having cam-projections, g, g', on each side of their pivots and having rounded heads, g2, entering sockets in the bottom of the jaws. 'Recesses,- G2, cut from the central bore of the sliding sleeve outwardly 4receive the lower ends of the camand locking-bars, G3, secured in the recesses by screws, g3, and entering into the longitudinal grooves, G4,'in the outer periphery of the'chuck-spindle and, therefore, adding to their other functions, that of splines or keys to-cause the sleeve to rotate with the chuck-spindle, notwithstanding its movements therealorig. i i The cam-bars operating the lowerj aws differ frown-those which operate the upper jaws inseveral respects. Each has a shank,'lg4, of such width and thickness that it fills th`e`longitudi'n'al groo've, G*,v and the opposing recess in the sliding sleeveand' performs theo'ice ofa spline from 'which'the remainder' of the bar 'isrelievedl Near the upper end 'of this shank it has acamprojection, G5, which engages alternately with the taillcaln, g, and the body-cam, g', ofthe adju'stingplever.V Beyond this its thickness'is reduced audit isoffset laterally and cut away to afford a passage, ge, thro'ugh'w'hich the lugfrom the lowerj aw can pass when saidjawis'projected by its-spvrir'igy or withdrawn by its lever. Beyond this opening it` is widened again to afford a locking projection or plate, g'l,which enters the channel between the lateral lug and'shoulder of the'jaw and thejlo'cking strip vand shoulder of the spacing-block and serves to lock the jawin its advance position; lWhen the spring pressed lower jaw vis in its retracted position, the cam and lockingbar is at th'eextreme of itsupwardfmovement (Fig-` 5), with its camprojection, g5, engaging `the body-cam, gfof and locking thejaw open, and the lateral offset from said jaw is outside of the cam-bar and in range with the lower end of the opening therethrough, while the locking section of said bar fills the groove or channel formed by the shouldered spacing-block and `its pendent strip. When the sleeve begins to fall it draws the cam-bar down carrying the cam-projection temporarilyout of engagement Withthe lever, when thelforce 'of the spring'proj ectsthe j aw past the opening in the locking-bar and into the positionshown in Fig. 4, and, as .said bar continues to descend, its cam-projection'engages-'with the tailicam of-the lever while the locking-section at its upper end, not yet having left the channel in the spacing-block, en-

gages the lateral offset of thej aw, and is slowly withdrawn along theextensionof the channel in the jaw, rigidly securing the jaw against retraction'. The yet continued movement carries the cam-projection below the tail of the pivoted lever, but this locking section still remains in engagement with the channel inthe jaw and holds the latter locked, and consequently the lever in position for the return of the cam-projection in the upward rise of the sleeve. projection ofthe sliding j aw, the upper jaws have been opened and the finished nut, H,fhas fallen therefrom upon the lower jaws, and now, while the lower'jaws are held closed, they are Meanwhile, succeeding the sudden returned-to position to grasp the flattened shank ofthe tap.v 'Concurrently with theirl closing movement the locking-bars rise, still temporarily retaining the lower jaws fixed in position until the cam-projection,'g5,has passed bythe tail ofl the operating lever and engaged with the body-cam, g', at' which moment the lateraloffsets of the lower jaws register with the opening or cut away partof' the lockir'ig-v bar" and the jawsy are retracted against thestress of their springs, pushing out the springbolt-and opening the'upper'or secondary set of shield-plates.

In order to-remove the tap the shanksof the locking-bars have each la socket, "lo, formed therein adjacent to the screw vby whichl they are fastened to the sleeve, into which socket may be linserted one end of the lever, The housing is bored at lo (see Figs. 4 and 14), to afford a fulcruni for this lever which' is, of course,to 'be inserted and removed through said'opening. When it becomes necessary to remove 0rv replace the tap, the screws fastening the locking-bar to the sleeve are withdrawn, asinFig. 14, then the lever is applied IOO rito

and the 'cam or locking-bar pushed down- A wardt'o thebase ofthe sleeve, entirely riemoving it from engagement with' the lower jaws; the sleeve then' being operated in such manner as to open the upper jaws, the lower jawscan be' opened at will, by pressing apart the'exposed shields carried thereby, andffa newtap inserted and the jaws released, when they will at once grasp the squared lower section of the tap. The locking-jaws may then, by means of the "lever, be readjusted, their confining screws' driven home and the next action of the machine will cause the regular operation to be resumed. i f

So far as the interlocking feature ofthe chuck-jaws is involved,it is not intended to limit the invention to the use of sliding-jaws, as it is evident that vjaws pivotedtoswing in aplane intersecting `the axis of the r tap or chuckfmay be formed with interlockingflfingers. Such jaws',l however, 'will 'not'ibe a'ble to so'eect-ually embrace the'squaredsection of the yShanks on vallsides 'as maybe done-by Vover, it `will be understood, that the terms? upper and outer, under and lower, top and; bottom, appliedito the position of the parts,` aresirnply relative terms, referring to thepo-f sition ofthe parts as shown inithedrawingsmy 4and arenot intended as unaterial 4:terms of limitation. L What I claiinasthoinvention of the said? :FRANK SuCOOK, deceased, is-

`1.filheicombination substantially as here- `inbefore set fforth, with the chuck-spindle, dfi` jaws eachprovidedwith liattenedngersfhaving internal `faces-parallel with the axis` of the tap,-wl1ich ,interlock with similar :iin gers Aon; the opposing jaw andieinbrace the shank ,of the'toollin a-recess thus formed between ithe basefand, onefinger of i one `jaw and 4thabasei and oneifingerof the other jaw. Y 1

l2. The combination substantially as here-J inbefore-setfforth, ,withithe chuck-spindle, of? slidingjawseach `provided iwith projecting: fngers'flattened parallel with `the axis offthe tap, opposed ,tosimilar proj ecting fingers on 3` the other-jaw,` andarranged to Aslip past each other as the jaws are brought together-and leavearccess between the-base and oneflin-i gert of one -j awand the base and one finger ot'l the other jaw.

3. The combination, substantially as hereinbefore'set forth, y,with the chuck-spindle and its slottedmings, of the upper sliding jawsl seated in said wings, the housing slotted iin lines zparallel with Athe movement ofsaid jaws, andthe sliding shields secured to said jaws by bolts or `screws Y passing through the slots in-the housing. t

4. `The combination, substantially ashereinbefore setfforth, of the ,l chuck-spindle` provided with `wings having seats andislotted beneath said seats, sliding-jaws moving in saidseats, leverspivotedin the slots beneath said jaws, engaging with sockets lin the jaws, andhaving body and tail cam projections, a sliding sleeve, and bars secured to said sleeve andhaving cam `and locking projections .to engage with theiheel of thejaw and thelevercams.

5. The combination, substantially as hereinbefore set forth, of the chuck-spindle having wings provided with seats or ways and slotted beneath said ways, jaws sliding `in said seats, levers pivoted in the slots beneath said seats, engaging with the jaws, and having cam-projections each side of their pivot, the housing embracing the exterior, of the wings, the sliding sleeve and cam-bars secured to said sleeve, seated as totheir backs against the housing and provided with cam and locking projections, the first to advance and retract the jaws by engaging with the lcver-cams andthe seeondto lock the jaws in `their advanced `position by engaging with `their heels.

6. Thewcornbination, substantially as hereinbefore set forth, of thechuclr-spindlehaving wings provided with seats or ways and 1slotted beneath said ways, jaws sliding in said seats, levers pivoted in the slots beneath said seats engaging with the lj aws and having cam-projections each side of their pivot, the `housing embracingthe exteriorof the wings, ithe slidingfsleeve and cam-bars secured `to said sleeve, seated asitotheir backs against ithefhousingtting into theslotsof the wings,

landvprovidedwith cam `and locking projecitions, the first lto advance and retract :the jaws Aiby engagingiwith the lever-cams, and the second to lock the jaws initheir-adv,anced pousition lby engaging ,with-their heels,

'7. The combination, substantially as hereinbet'oreset forth,of\the,chnckfspindle having ywings A`provided with seats `or ways, `the `spacirig-blocks grooved or channeled` on` their under surface, the sliding jaws groovedor channeled on theirupper surface,the.headed bolts entering the .recesses `formed bythe channels, andthe springs coiled around said bolts and operatingtoforceY the `sliding, jaws forward.

i8. ,The combination, substantiallyas'hereinbefore setV forth,1 of @the chuck-spindle hav- `ing wings provided with seats, yof thehousing, theispacing-blocks groovedfor channeled on gtheinunden surface` through a portion of their length, the sliding jaws arrangedwithin the seat beneath: the spacingeblocksand grooved or channeled on their upper surfaces opposite the. grooves or channelsjin the spacing-block, ;the,iheaded bolts arrangedwithin the recesses formed by said grooves or channels, coiled springs seatedat one end against the head ot' l the ,bolts and at the other end lagainst the housing, the lbrackets secured to the outer end of thelbolts beyond ,the housing, the shields secured to thebrackets above the top `of." the housing, and means for retracting the sliding jaws againstthe force ofthe springs.

9. The` combination, substantially aslhereinbefore set forth,`of` the chuck-spindle having wings provided with seats, or ways and slotted beneath said seats, the spacing-blocks grooved or channeled on their under surface, the sliding jaws grooved or channeled on `their upper surface, the headed bolts entering the recesses formed `by the matching i channels,the springs coiled around the bolts and operating to force the sliding jaws forward, thetlevers pivoted in the slotted wings beneath the jaws and engaging with sockets in said jaws, and the cam-bars operating said levers to retract the jaws against the force of the springs.

10. The combination,,substantially as hereinbefore set forth, of the chuck-spindle having wings provided with seats and ways and slotted beneath said ways, the spacing-blocks grooved or channeled on their under surface,

ing to force the sliding jaws forward, the

levers pivoted inthe slotted wings beneath `said jaws, engaging with the jaws, and having cam projections and the sliding bars havlng aVv cam projection engaging with the lever cams.

11. The combination, substantially as hereinbefore set forth, ofthe chuck-spindle havin g a longitudinal groove or grooves andradlally slotted wings, jaws playing in the slots in s aid wings and levers provided with camprojectionsfor operating the jaws, the sliding sleeve, and cam-bars secured to said slid-v ing sleeve, provided with cam-projections engaging the cam-projections on the lever to move the jaws to and fro, and one or both fitting within the longitudinal groove or grooves of the spindle. j

12. The combination, substantially as hereinbefore set.forth, of the fixed spacing-block having a locking-channel, the sliding jaw also having a locking-channel, the lever engaging with said sliding jaw and havingA cam-projections, the sleeve, and the sliding-bar attached to said sleeve, having a-cam-proj ection to engage the llever-cams, and a locking extension to engage the channels in the spacing-block and sliding jaw. s

13. The combination, substantiallyas hereinbefore set forth, of the spacing-block having a locking-channel, the sliding jaws also having a locking-channel, the headed bolt, the spring encircling said bolt and urging the jaw forward, the pivoted lever engaging with a socket in the Sliding jaw and having camprojections, thel sliding sleeve, andthe bar attached thereto having a cam-projection to engage with the lever' cams and alocking extension to enter the channels in the spacingblock and jaw.

14:. The combination, substantially as hereinbefore set forth, of the spacing-block having a locking-channel and pendent locking strip forming one side of said channel, the sliding jaw having a locking-channel to register with the one .in thespacing-block and an oifset forming oneside of said channel to register with thependent strip, the headed bolt and its spring, the pivoted lever engaging with the socket in the sliding jaw and having camprojections,the sleeve, and the bar attached thereto havinga cam-projection to engage with thelever cams, a recess or opening to permit the passage of the-odset from the jaw anda locking extension to engage with the channels in the jaw and spacing-block.

1 5. The combination, substantially as hereinbefore set forth, of the chuck-spindle having radial wings formed with seats and slotted beneath said seats, the upper sliding jaws moving in the seats in two of said wings, the lower sliding jaws moving in seats in the other two wings, the levers pivotedon the slots of the wings beneath said jaws and engaging with the sockets in the jaws, the hous. ing, the sliding sleeve, the cam and locking bars attached to the outer periphery ofthe sleeve to operatethe upper jaws and the earn and locking-bars attached to the inner peripheryof said sleeve to actuate the lower jaws.

16. The combination, substantially as hereinbefore set forth, of the longitudinally channeled -chuck-spindle having radial wings provided with seats and slotted beneath said seats for the reception of levers, the upper sliding jaws playing in two of said seats,the lowersliding jaws playing in the other two, the levers engaging with sockets in said jaws and pivoted in the slotted wings, beneath the jaws, the 'sliding sleeve, the cam and lockingbars attached vto the exterior of said sliding sleeve to actuate the upper jaws, and the cam and locking-bars attached to the interior ,of said sleeve to actuate the lower jaws and f1tting in the grooves or channels in the spindle lto serve as splines. v

17. The combination, substantially as hereinbefore set forth, of the lower sliding jaws, sliding sleeve, levers, cam and locking-bars secured by screws and socketed as set forth, and the housing having an opening Vadjacent to the sleeve opposite to the sockets in the cam-bar to serve as a fulcrum for a lever.

, JEROME W. COOK,

Administrator ofthe estate of Frank S. Cook.

Witnesses:

A. P. LINN COCHRAN, ROBERT C. RoDGERs. 

